First-principles prediction of high Curie temperature for ferromagnetic bcc-Co and bcc-FeCo alloys and its relevance to tunneling magnetoresistance

Lezaic, M.; Blügel, S.; Mavropoulos, Ph.

doi:10.1063/1.2710181

Journal Article

First-principles prediction of high Curie temperature for ferromagnetic bcc-Co and bcc-FeCo alloys and its relevance to tunneling magnetoresistance

Lezaic, M.FZJ* ; Mavropoulos, P.FZJ* ; Blügel, S.FZJ*

2007
American Institute of Physics Melville, NY

Applied physics letters 90, 082504 (2007) [10.1063/1.2710181]

This record in other databases:

Please use a persistent id in citations: http://hdl.handle.net/2128/18081 doi:10.1063/1.2710181

Abstract: The authors determine from first principles the Curie temperature T-C for bulk Co in the hcp, fcc, bcc, and body-centered-tetragonal (bct) phases, for FeCo alloys, and for bcc and bct Fe. For bcc Co, T-C=1420 K is predicted. This would be the highest Curie temperature among the Co phases, suggesting that bcc-Co/MgO/bcc-Co tunnel junctions offer high magnetoresistance ratios even at room temperature. The Curie temperatures are calculated by mapping ab initio results to a Heisenberg model, which is solved by a Monte Carlo method. (c) 2007 American Institute of Physics.

Keyword(s): J

Classification: